Here is the full list of all 40 Mercenaries 2: World in Flames achievements worth 1,000 gamerscore.
You unlocked all landing zones.
You destroyed 200 objects from the gunner seat in co-op.
You used 20 airstrikes in co-op.
You came in first during a co-op race.
You pissed off everyone in Venezuela.
You verified all high value targets.
You destroyed 50 objects with a grenade.
You achieved maximum Pirate mood.
You completed Mercenaries 2.
You battled for Caracas.
You mastered the Winching Challenge.
You performed a burnout.
You achieved maximum mood with the Allies.
You completed three races.
You achieved maximum Chinese mood.
You verified Carmona.
You verified Blanco.
You destroyed 50 objects with an RPG launcher.
You recruited Misha.
You destroyed 50 objects using melee.
You recruited Eva.
You successfully completed 10 action hijacks.
You achieved maximum P.L.A.V. mood.
You completed one of Fiona's challenges.
You destroyed 20 buildings.
You captured all outposts for a single faction.
You earned $1 million.
You played with a Mercenaries 2 developer or a player who already had this Achievement.
You experienced co-op.
You recruited Ewan.
You achieved maximum Universal Petroleum mood.
You acquired the PMC.
You hijacked the tank in the villa.
You got 25 headshots.
You completed "Rescue Carmona."
You completed the tutorial.
Snipe 50 enemy vehicle drivers.
Unlock all shop items.
You captured all high value targets.
Earn $1 billion.